Heater



FIG. 1 is a top, front, right side perspective view of a heater showingmy new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing structural features are included for thepurpose of illustrating non-claimed subject matter and form no part ofthe claimed design.

CLAIM The ornamental design for a heater, as shown and described.